General Contact Info

info@mainstreetcu.ca

1295 London Road
Sarnia, ON
N7S 1P6

1-866-380-8008

Monday - Friday 8:30 - 5:00

Find a Branch

Other Ways to Reach Us

Lost or Stolen Cards

Contact us immediately if you suspect your card has been stolen or your information has been compromised.

Debit cards:
1-888-277-1043 (Toll Free)

CUETS Mastercard (previous credit cards):
1-800-567-8111 (Toll Free - 24 Hours)

Collabria Mastercard:
1-855-341-4643 (Toll Free - 24 Hours)

Telephone Banking

1-855-869-6133 (Toll Free)

Complaints or Concerns

To file a formal complaint please contact our Complaints Officer at complaints@mainstreetcu.ca

Online Banking Support

If you're experiencing technical difficulties with our website, including being unable to access your online account, please contact technical support 24/7 at 1-888-273-3488.

Contact Mainstreet

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Invested in you.